Tafseer literally means to explain. It is the Arabic word for exegesis, usually of the Qur'an.

Tafseer is most known as the explanation of the Qur'an, it derives from the root "فسر" which means to explain.

A Quranic tafsir will often explain intent or provide places and times, not contained in Quranic verses, as well as give restriction of meanings, or explanations for why verses seem contradictory.